[iamatworknow]

They mention that in the video.

It also mentions that they're thinking of creating a tumble/drum dryer with these piezoelectrics. As opposed to a traditional tumble dryer that spins to aerate the cloths, I think the spinning motion would instead be required to pin the clothing against the piezoelectric lined drum (though I imagine it would need to stop and change direction periodically in order to expose different areas of the fabric to the drum wall).